<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Think.class.php 2791 2012-02-29 10:08:57Z liu21st $

/**
 +------------------------------------------------------------------------------
 * ThinkPHP Portal类
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Core
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: Think.class.php 2791 2012-02-29 10:08:57Z liu21st $
 +------------------------------------------------------------------------------
 */
class Think {

	private static $_instance = array();

	/**
	 +----------------------------------------------------------
	 * 应用程序初始化
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	static public function Start() {
		// 设定错误和异常处理
		set_error_handler(array('Think', 'appError'));
		set_exception_handler(array('Think', 'appException'));
		// 注册AUTOLOAD方法
		spl_autoload_register(array('Think', 'autoload'));
		//[RUNTIME]
		Think::buildApp();         // 预编译项目
		//[/RUNTIME]
		// 运行应用
		App::run();
		return;
	}

	//[RUNTIME]
	/**
	 +----------------------------------------------------------
	 * 读取配置信息 编译项目
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	static private function buildApp() {
		// 加载底层惯例配置文件
		C(include THINK_PATH . 'Conf/convention.php');

		// 读取运行模式
		if (defined('MODE_NAME')) { // 模式的设置并入核心模式
			$mode = include MODE_PATH . strtolower(MODE_NAME) . '.php';
		} else {
			$mode = array();
		}

		// 加载模式配置文件
		if (isset($mode['config'])) {
			C(is_array($mode['config']) ? $mode['config'] : include $mode['config'] );
		}

		// 加载项目配置文件
		if (is_file(CONF_PATH . 'config.php'))
		C(include CONF_PATH . 'config.php');

		// 加载框架底层语言包
		L(include THINK_PATH . 'Lang/' . strtolower(C('DEFAULT_LANG')) . '.php');

		// 加载模式系统行为定义
		if (C('APP_TAGS_ON')) {
			if (isset($mode['extends'])) {
				C('extends', is_array($mode['extends']) ? $mode['extends'] : include $mode['extends']);
			} else { // 默认加载系统行为扩展定义
				C('extends', include THINK_PATH . 'Conf/tags.php');
			}
		}

		// 加载应用行为定义
		if (isset($mode['tags'])) {
			C('tags', is_array($mode['tags']) ? $mode['tags'] : include $mode['tags']);
		} elseif (is_file(CONF_PATH . 'tags.php')) {
			// 默认加载项目配置目录的tags文件定义
			C('tags', include CONF_PATH . 'tags.php');
		}

		$compile = '';
		// 读取核心编译文件列表
		if (isset($mode['core'])) {
			$list = $mode['core'];
		} else {
			$list = array(
			THINK_PATH . 'Common/functions.php', // 标准模式函数库
			CORE_PATH . 'Core/Log.class.php', // 日志处理类
			CORE_PATH . 'Core/Dispatcher.class.php', // URL调度类
			CORE_PATH . 'Core/App.class.php', // 应用程序类
			CORE_PATH . 'Core/Action.class.php', // 控制器类
			CORE_PATH . 'Core/View.class.php', // 视图类
			);
		}
		// 项目追加核心编译列表文件
		if (is_file(CONF_PATH . 'core.php')) {
			$list = array_merge($list, include CONF_PATH . 'core.php');
		}
		foreach ($list as $file) {
			if (is_file($file)) {
				require_cache($file);
				if (!APP_DEBUG)
				$compile .= compile($file);
			}
		}

		// 加载项目公共文件
		if (is_file(COMMON_PATH . 'common.php')) {
			include COMMON_PATH . 'common.php';
			// 编译文件
			if (!APP_DEBUG)
			$compile .= compile(COMMON_PATH . 'common.php');
		}

		// 加载模式别名定义
		if (isset($mode['alias'])) {
			$alias = is_array($mode['alias']) ? $mode['alias'] : include $mode['alias'];
			alias_import($alias);
			if (!APP_DEBUG)
			$compile .= 'alias_import(' . var_export($alias, true) . ');';
		}
		// 加载项目别名定义
		if (is_file(CONF_PATH . 'alias.php')) {
			$alias = include CONF_PATH . 'alias.php';
			alias_import($alias);
			if (!APP_DEBUG)
			$compile .= 'alias_import(' . var_export($alias, true) . ');';
		}

		if (APP_DEBUG) {
			// 调试模式加载系统默认的配置文件
			C(include THINK_PATH . 'Conf/debug.php');
			// 读取调试模式的应用状态
			$status = C('APP_STATUS');
			// 加载对应的项目配置文件
			if (is_file(CONF_PATH . $status . '.php'))
			// 允许项目增加开发模式配置定义
			C(include CONF_PATH . $status . '.php');
		}else {
			// 部署模式下面生成编译文件
			build_runtime_cache($compile);
		}
		return;
	}

	//[/RUNTIME]

	/**
	 +----------------------------------------------------------
	 * 系统自动加载ThinkPHP类库
	 * 并且支持配置自动加载路径
	 +----------------------------------------------------------
	 * @param string $class 对象类名
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	public static function autoload($class) {
		// 检查是否存在别名定义
		if (alias_import($class))
		return;

		if (substr($class, -8) == 'Behavior') { // 加载行为
			if (require_cache(CORE_PATH . 'Behavior/' . $class . '.class.php')
			|| require_cache(EXTEND_PATH . 'Behavior/' . $class . '.class.php')
			|| require_cache(LIB_PATH . 'Behavior/' . $class . '.class.php')
			|| (defined('MODE_NAME') && require_cache(MODE_PATH . ucwords(MODE_NAME) . '/Behavior/' . $class . '.class.php'))) {
				return;
			}
		} elseif (substr($class, -5) == 'Model') { // 加载模型
			if (require_cache(LIB_PATH . 'Model/' . $class . '.class.php')
			|| require_cache(EXTEND_PATH . 'Model/' . $class . '.class.php')) {
				return;
			}
		} elseif (substr($class, -6) == 'Action') { // 加载控制器
			if ((defined('GROUP_NAME') && require_cache(LIB_PATH . 'Action/' . GROUP_NAME . '/' . $class . '.class.php'))
			|| require_cache(LIB_PATH . 'Action/' . $class . '.class.php')
			|| require_cache(EXTEND_PATH . 'Action/' . $class . '.class.php')) {
				return;
			}
		}

		// 根据自动加载路径设置进行尝试搜索
		$paths = explode(',', C('APP_AUTOLOAD_PATH'));
		foreach ($paths as $path) {
			if (import($path . '.' . $class))
			// 如果加载类成功则返回
			return;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 取得对象实例 支持调用类的静态方法
	 +----------------------------------------------------------
	 * @param string $class 对象类名
	 * @param string $method 类的静态方法名
	 +----------------------------------------------------------
	 * @return object
	 +----------------------------------------------------------
	 */
	static public function instance($class, $method = '') {
		$identify = $class . $method;
		if (!isset(self::$_instance[$identify])) {
			if (class_exists($class)) {
				$o = new $class();
				if (!empty($method) && method_exists($o, $method))
				self::$_instance[$identify] = call_user_func_array(array(&$o, $method));
				else
				self::$_instance[$identify] = $o;
			}
			else
			halt(L('_CLASS_NOT_EXIST_') . ':' . $class);
		}
		return self::$_instance[$identify];
	}

	/**
	 +----------------------------------------------------------
	 * 自定义异常处理
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $e 异常对象
	 +----------------------------------------------------------
	 */
	static public function appException($e) {
		halt($e->__toString());
	}

	/**
	 +----------------------------------------------------------
	 * 自定义错误处理
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param int $errno 错误类型
	 * @param string $errstr 错误信息
	 * @param string $errfile 错误文件
	 * @param int $errline 错误行数
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 */
	static public function appError($errno, $errstr, $errfile, $errline) {
		switch ($errno) {
			case E_ERROR:
			case E_USER_ERROR:
				$errorStr = "[$errno] $errstr " . basename($errfile) . " 第 $errline 行.";
				if (C('LOG_RECORD'))
				Log::write($errorStr, Log::ERR);
				halt($errorStr);
				break;
			case E_STRICT:
			case E_USER_WARNING:
			case E_USER_NOTICE:
			default:
				$errorStr = "[$errno] $errstr " . basename($errfile) . " 第 $errline 行.";
				Log::record($errorStr, Log::NOTICE);
				break;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 自动变量设置
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param $name 属性名称
	 * @param $value  属性值
	 +----------------------------------------------------------
	 */
	public function __set($name, $value) {
		if (property_exists($this, $name))
		$this->$name = $value;
	}

	/**
	 +----------------------------------------------------------
	 * 自动变量获取
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param $name 属性名称
	 +----------------------------------------------------------
	 * @return mixed
	 +----------------------------------------------------------
	 */
	public function __get($name) {
		return isset($this->$name) ? $this->$name : null;
	}

}